22418020 has 12 divisors (see below), whose sum is σ = 47077884. Its totient is φ = 8967200.

The previous prime is 22418017. The next prime is 22418047. The reversal of 22418020 is 2081422.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 13017664 = 3066^2 + 3608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560431 + ... + 560470.

It is an arithmetic number, because the mean of its divisors is an integer number (3923157).

Almost surely, 2^22418020 is an apocalyptic number.

22418020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22418020 is an abundant number, since it is smaller than the sum of its proper divisors (24659864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22418020 is a wasteful number, since it uses less digits than its factorization.

22418020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120910 (or 1120908 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 22418020 is about 4734.7671537257. The cubic root of 22418020 is about 281.9675196902.

Adding to 22418020 its reverse (2081422), we get a palindrome (24499442).

The spelling of 22418020 in words is "twenty-two million, four hundred eighteen thousand, twenty".